Malicious PDF — malware analysis report

Static analysis result for SHA-256 619b6a356dbd983c…

MALICIOUS

PDF

91.0 KB Created: 2021-09-10 20:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 11cdaa5a527bb6f7c330410b623b9352 SHA-1: 28c947e32b04ec43e0751da1d518a0f222c52b9a SHA-256: 619b6a356dbd983c72bcf963b94339d13002d2667da08c372ce0bb3dd5158c30
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to one of the numerous external URLs, which are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9744

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maria-galland.ru/files/file/nujafera.pdf In PDF document text
    • http://showdoimovel.com/files/files/domapulagijexin.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/90331438678.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210903102533.pdfIn PDF document text
    • https://www.pu-sk.com/app/templates/js/ckfinder/userfiles/files/22040045650.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613567b321ab6---56565614501.pdfIn PDF document text
    • http://jnejendomsdrift.dk/userfiles/file/66968713477.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/12194976651.pdfIn PDF document text
    • http://oawebserver.com/piceditor/file/ridojutagabew.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/47396849082.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/60490918443.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/rivikabarubomopivirifapir.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/5528258757.pdfIn PDF document text
    • http://skolky.info/foto/images/file/1259023999.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/duo8fibq3kcracqt4chpc693i5/21266577978.pdfIn PDF document text
    • https://mimpiindah2.com/contents/files/fowakidulexebamepix.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/witufopa.pdfIn PDF document text
    • http://temple.mo/userfiles/file/65589405917.pdfIn PDF document text
    • http://kleinschadenexpert.com/userfiles/file/88575185919.pdfIn PDF document text
    • https://msvadba.ru/files/file/tukajewafujejurejex.pdfIn PDF document text
    • http://www.farmaciavictoriayjmleon.com/userfiles/files/barapinixokupimasugalipe.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/rugamozizadijikugatoxifa.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/95006677629.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/retabodaxa.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/femisosawogokiwasojutu.pdfIn PDF document text
    • http://gapp.fr/medias/files/78205337865.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=dragon+sim+online+apkPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F4 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d
font_01_sfnt_off0000eede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDE 24696 bytes
SHA-256: 9f629fe83addb11a6605bc45ae6197d73cf7f30fcd22fa21d2bef915fb373355
font_02_sfnt_off00012d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D76 10588 bytes
SHA-256: d6a7437f1ab45c6ca814d89ae8f760c7ed77a20ac329e26a2939980c06bd54b4
font_03_sfnt_off00014590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14590 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1